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Guinea pig Bottom tooth broken down to the bottom finally growing (Questions

PinkytheGuineaPig47

Junior Guinea Pig
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Hello,

I apologize if this is not the right place to post—it's been a while since I last reached out, but I’m hoping to get some guidance regarding my guinea pig's dental health and behavior.

Last week, my guinea pig broke his bottom left incisor. The tooth didn’t fall out completely—it broke very low, close to the gumline, but a small portion of the tooth remains and it has been slowly growing back.

In the first 24 hours after the break, he wasn’t eating much hay. However, over the next 2 to 6 days, he resumed eating hay consistently with no apparent difficulty. Recently, though, as the tooth continues to grow in, I’ve noticed that he is eating less hay again. He often picks up hay, drops it, and seems to take a long time—sometimes 10 to 20 minutes—to settle on a piece and start eating. While he eventually eats, the frequency and duration seem noticeably reduced. He used to eat hay for up to 6 hours a day, and now it’s closer to 3.

I understand from what I’ve read that guinea pigs may not consume as much hay when a bottom tooth is missing or damaged. I’m just unsure how normal this behavior is during the regrowth process.

One of my main questions is about the position of the new tooth. Since the broken tooth is still very small, is it normal for it to sit slightly under the tongue or feel that way? When I syringe-feed him water, I feel his tongue before I feel the tooth. I’ve also let him chew a little on my pinky (with probiotics on it), and again, I feel his tongue before the small tooth. Is that normal positioning while the tooth is regrowing?

To be clear, I did take him to an exotic vet shortly after the injury. She examined him and said everything looked normal and that the tooth was growing back as expected. I have a follow-up appointment scheduled this week for another checkup.

In terms of behavior, he seems otherwise healthy—active, sleeping well, drinking water normally, and still begging for food and treats. He does eventually eat hay and chews it properly once he gets going, but the reduced frequency and the effort it takes to begin eating are what concern me.

I may be overthinking it, but I care deeply about his well-being and want to make sure I’m not missing anything important. Thank you in advance for any insights or reassurance you can offer.

Best regards,
 
Are you support feeding him critical care?
have you switched from the routine weekly weight checks and instead weighing him daily?

The fact he is struggling to eat hay and may well be eating less hay could mean he will lose weight, so it is very important you are syringe feeding him critical care to help keep with his fibre intake and keep his weight stable each day.

i imagine you are feeling the tooth more easily because its small but the follow up vet check should help you

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Are you support feeding him critical care?
have you switched from the routine weekly weight checks and instead weighing him daily?

The fact he is struggling to eat hay and may well be eating less hay could mean he will lose weight, so it is very important you are syringe feeding him critical care to help keep with his fibre intake and keep his weight stable each day.

i imagine you are feeling the tooth more easily because its small but the follow up vet check should help you

Weight and Weight Loss Explained: BMI, Weighing, Poos and Feeding Support
All About Syringe Feeding and Medicating Guinea Pigs with Videos and Pictures
Hey yes I have feeding him critical care, he loves eating it a lot, I give it to him every 3-4 hours a full scoop, and yes I have weight him daily, thankfully he's stable if not gaining a few grams so is good, just being very picky with the hay still and taking long to get himself eating hay
 
I just worry much as I know 90% of the diet is hay, and I'm just used at him eating for hours and hours everyday of hay, but I assume broken tooth and growing can impact him eating less correct? Thank u for answering I appreciate the help as well and we are going to the vet this Tuesday for a follow up!
 
I just worry much as I know 90% of the diet is hay, and I'm just used at him eating for hours and hours everyday of hay, but I assume broken tooth and growing can impact him eating less correct? Thank u for answering I appreciate the help as well and we are going to the vet this Tuesday for a follow up!

Yes three quarters of the diet (75-80% of the diet) is hay and grass but that is the reason you syringe feed when they are not eating enough hay. Your syringe feeding is replacing the fibre intake he has lost. It’s why you need to to feed such a lot.

Yes a broken tooth can cause the reduction in hay intake - it can be due to pain or simply not being able to pick the hay up as effectively (the incisors are used to pick food up).
 
Yes three quarters of the diet (75-80% of the diet) is hay and grass but that is the reason you syringe feed when they are not eating enough hay. Your syringe feeding is replacing the fibre intake he has lost. It’s why you need to to feed such a lot.

Yes a broken tooth can cause the reduction in hay intake - it can be due to pain or simply not being able to pick the hay up as effectively (the incisors are used to pick food up).
Thank u I feel much better
 
Other than syringe feeding, weight checks daily, pain meds, checking with the vet and then waiting for the tooth to regrow, there isn’t anything else you can do.

Let us know what the vet says at the check up
 
Just a quick update following our visit to the vet. She examined the tooth that’s growing in and said it’s developing well. She also trimmed the top two teeth, as they were becoming uneven and slightly overgrown. They are now properly aligned. Additionally, she checked for any issues with the molars and possible tongue entrapment—everything looked good. He has lost about 20 grams, but overall, the news was positive.

One question: how long after a tooth trim should I expect him to return to eating hay as well as he did before?
 
If the cause is the issue has been dealt with and he is not in any pain, then he should be trying to pick hay up again and trying to eat.

If he still can’t pick up hay as the tooth regrows or continues to struggle chewing then it is possible an issue still remains.
 
Thank you so much I really appreciate your help. Do you have a recommendation on how long I should wait before making another vet appointment? Would 2–3 days be reasonable to see if he gradually starts eating more hay? Apologies for all the questions; this is the first time I’ve encountered this situation. Because the vet did say everything looks great and she did a full check up, with mouth teeth and full body examination as well!
 
If he isn’t in pain and there is no obvious reason for him not eating, then giving him a few days might make the difference.
Otherwise do contact your vet again if he is still refusing to eat any hay
 
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